Hot water supply system



June 16, 1931. G. R. TELLAN DER HOT WATER SUPPLY SYSTEM Filed Jan.

12, 1928 2 Sheets-Sheet l Gurmer 7i. ZdZcL LcZer,

June 16, 1931. G. R. TELLANDER HOT WATER SUPPLY SYSTEM Filed Jan. 12, 1928 2 Sheets-Sheet 2 14 ,Ewezzibr.

Patented June 16, 1931 rATaNr orrica GUNNAR RICHARD TELLAN DER, OF GOTTENBORG, SWEDEN HOT WATER SUPPLY SYSTEM Application filed January 12, 1928, Serial No. 246,343, and in Sweden May 14, 1926.

The present invention relates to hot water supply systems of the kind in which the water heated in the boiler system is not consumed itself but is used for heating the service water intended to be drawn off.

p through the water tank, and a receptacle of a small volume in relation to the water tank, which receptacle at its top communicates with the upper portion of the water tank and its bottom with the lower portion of the water tank, and which receptacle contains a tube system or the like through which the service wateris caused to pass in order to be heated.

Some embodiments of the invention are illustrated on the accompanyin drawings, wherein Figure 1 shows a water heating system according to one embodiment of the invention, Figure 2 is a diagrammatic View of the system shown in Figure 1, Figure 3 is a longitudinal section of the receptacle shown in Figure 1, Figure 4 is a longitudinal section through 'a similar receptacle according to a modified embodiment, and Figure 5 is a diagrammatic view'of a modification of the water heating system. 7

Referring first to the Figures 1-3, 1 denotes the heater of the system which maybe of any suitable type, f. i. as shown, an ordinary boiler for a house heating system of a hot water type, the pipe 2 conducting the water to the radiators of the system, and '3 denoting the return pipe from the radiators. 4 de notes a water tank of a great volume to which the water heated in the boiler 1 is conducted through a pipe 6 and from which the water returns to the boiler through a pipe 7 To the water tank 4 a small receptacle 8 is connected by means of two pipes 9 and 10, the pipe 9 connecting the upper portions of the tank 4 and the receptacle 8, and the pipe 10 connecting the lower portions of the same.

Within the small receptacle 8 there is provided a set of spiral-shaped pipes 11, each connected at the one end to a chamber 12 provided at the top of the receptacle, and at the other end toa chamber 13 provided at the lower portion of the same, the last mentioned chamber 13 being by means of a pipe 14 connected to the cold water service 15 while the upper chamber 12 is connected to a discharge pipe 16 which conducts the water heated in the pipe system 11 to the water taps 18.

As long as any difierence exists between the temperature of the water in the boiler 1 and the water in the tank 4, the water will circulate through the pipes 6, 7, the water tank 4 and the boiler 1 in the direction indicated by arrows in Figure 2. Similarly the water in the tank 4 will circulate, as indicated by the arrows, through the receptacle 8 containing the pipe system 11 for the service water.

When service water is drawn off through the taps 18 the water in the receptacle 8 is deprived of its heat, the water thus cooled flowing to the bottom of the tank 4 (or, alter natively, to the boiler 1). At the same time hot, Water flows to the receptacle 8 from the tank 4 through the pipe 9 (or, alternatively, from the boiler 1 through the pipe 6 and 9). It is to be observed thatthe hot and cold water in the tank 4 will be kept separated on account of the difference in specific gravity so that, even when large quantities of hot service water are drawn ofi', the water flowing over to. the receptacle 8 will keep it a rel- U atively constant temperature.

In order to maintain a movement of the water in the discharge pipe 16 and thus prevent the same from being cooled when water is not drawn off through the taps, a return pipe 20 is provided, the one end of the 5 same being connected to the discharge pipe 16 near the taps and the other end connected to the lower end of a spiral-shaped pipe 21 disposed within the receptacle 8, the upper end of this pipe being connected to the chamber 12. It is evident that by this arheated and at its other end directly to a pipe rangement a circulation of hot water is efi'ectfor the heated service water to be drawn ofi. ed through the discharge pipe 16 and the re- In witness whereof I have hereunto set my turn pipe 20 so that hot water immediately hand. can be drawn 011' at the taps l8. GUNNAR RICHARD TELLANDER. 70

In order that the water in the pipe may be given a low temperature, thus efiecting a lively circulation of the water throu h the receptacle 8, said pipe 10 is surroun ed by 10 the pipe 14 which conducts the cold service 7 water to the pipe-system 11.

In Figure 4 a modification of the receptacle 8 and its tube system is shown, according to which the latter consists of straight tubes. In order to facilitate the cleaning or so ,the sets of tubes 11a and 116, the receptacle 8b is at its one end provided with a detachable cover 21. The tubes 11a conduct the cold service water from a chamber 22 formed by the cover 21, the front tube plate 23 and a partition 24, to a chamber 25 disposed adjacent the rear tube plate 26, and from this chamber 25 the water returns through the tubes 11?; to a chamber 27 situated at the 25 front of the receptacle 8 at the other side of e the partition 24, to which chamber 27 the discharge pipe 16 for the heated service water is connected. The sets of tubes 11a and 11?) may suitably be separated by a 80 partition 28, which causes the water flowing through the receptacle 8 to pass along the sets of tubes in their longitudinal direction.

y In certain cases it may be convenient to dispose the receptacle 8 Within the tank 4, as

35 shown in Figure 5. In this case the hotwater in the tank 4a flows over the upper edges of the receptacle 8a and is conducted to the bot tom of the tank 4a where it leaves the recep tacle 8a in a cooled state. 40 It is of course understood that various modifications of the invention may be effected and such modification as is Within the scope of my claim I consider within the spirit of my invention. e 45 What I claim is A system for heating service water intended to be drawn off, comprising in combination, a heater, a receptacle of comparatively small Volume, a storage tank of a compara- 60 tively large volume entirely filled with a heating medium and communicatin at its upper portion to the upper portion ofthe receptacle and with the upper portion of the heater, and at its lower portion with the 55 lower portion of the receptacle and'with the lower portion of theheater, whereby to form together with saidheater and said receptacle a closed circulation system for the heating medium, a tube system for conveying the water to be heated arranged" within the receptacle, means for preventing the interior of said tube system from communication with the heating medium, and said tube system being connected at one of its ends directly to a supply pipe for the cold water to be 

